Bug#607266: gnome-core should not depend on evolution

[R. Lemos]

Package: gnome-core
Version: 1:2.30+7
Severity: normal

Since 1:2.30+7 gnome-core depends on evolution-data-server and evolution.
Previously this role used to be played by gnome-desktop-environment, which I
gladly kept from being installed on my system (since it draws too many useless
dependencies).

I think that there's no real reason for such a dependency. May be it should be
downgraded to just a "recommendation", or gnome-core should be split in more
fine-grained packages.